Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Summary of Supplemental Cash Flow Information

The following table summarizes the supplemental cash flow information for the years ended December 31:

	Years Ended December 31,
(dollars in thousands)	2019		2018			2017
Cash payments:
Interest	$	127,713	$	91,813		$	56,682
Income taxes (net of refunds)		5,494		(2,505	)		4,326
Noncash Investing and Financing Activities:
Securities transferred from held-to-maturity to available-for-sale		381,992		447,026			—
Securities transferred from available-for-sale to held-to-maturity		—		323,990			—
Transfer of premises and equipment to assets held for sale		2,689		9,634			16,617
Operating lease right-of-use assets obtained in exchange for lease obligations		113,498		—			—
Finance lease right-of-use assets obtained in exchange for lease obligations		7,871		—			—

Summary of Common Shares Issued and Resultant Value of Total Shareholders' Equity

The following table summarizes the common shares issued and resultant value of total shareholders’ equity associated with acquisitions for the years ended December 31:

			Total
	Shares of		Shareholders'
(dollars and shares in thousands)	Common Stock		Equity
2018
Acquisition of Klein		22,772	$	406,474
2017
Acquisition of Anchor (MN)		16,527	$	300,828